You have them too low in the oven or the temp too high.
The bottom sheet does not burn because one would be careful not to position the bottom rack too close to the heating element.
How about we pop these here scones into this unconventional oven, eh?
No, electric heaters work by running electric current through resistors which produces heat. same as an element on an oven range top.
because they r closest to the bottom of the oven
The bottom rack of the oven is the hottest in most electric and gas ovens. With that said, if you have an in oven broiler then you would use the top or middle racks for the hottest spot in the oven.
First of all, don't do it too often. It will burn out the enamel of the oven. Don't do it more than 3-4 times a year.
your oven can be up too high, you can fix this by buying an over thermometer to see what the actual temperature is... but you can also put baking sheets in the bottom of oven. I usually just put bacon on the bottom of my pan it adds a different flavor and keeps the meatloaf from burning!
An electric oven is safer, however it can cost more than a gas oven. It's a matter of preference.
The oven is too hot or you leave the cakes in too long. The former is more likely.
An electric double oven and an electric single oven would have about the same capacity. The only difference between the two is that you can cook two things at the same time with different temperatures using the double oven. It may even heat up faster as well.
No, they will not.
Most likely your oven is not hot enough. Alternatively, the scones could be too thick. Pat the dough out a bit more, perhaps into an 8" round instead of a 6" round.